オクノ ショウジ   Okuno Shoji
  奥野 祥二
   所属   神奈川大学  工学部 情報システム創成学科
   職種   助教
言語種別 日本語
発行・発表の年月 2003/12
形態種別 学術雑誌
査読 査読あり
標題 Measurement of Time-Dependent CP-Violating Asymmetries in B0 → φ K0S, K+K-K0S, and η'K0S Decays
執筆形態 共著
掲載誌名 Phys. Rev. Lett. 91, 261602 (2003) (6 pages)
著者・共著者 K. Abe, S. Okuno et al. [The Belle Collaboration]
概要 We present an improved measurement of CP-violation parameters in B0 → φ K0S, K+K-K0S, and η'K0S decays based on a 140 fb-1 data sample collected at the υ(4S) resonance with the Belle detector at the KEKB energy-asymmetric e+e- collider. One neutral B meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying B meson is identified from its decay products. CP-violation parameters for each of the three modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays. We find that the observed CP asymmetry in the B → φ K0S decay differs from the standard model (SM) expectation by 3.5 standard deviations, while the other cases are consistent with the SM.
,BELLE-66.